CN110284610B - Customized partially dismantled reinforced concrete structure and static crushing dismantling method thereof - Google Patents
Customized partially dismantled reinforced concrete structure and static crushing dismantling method thereof Download PDFInfo
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- CN110284610B CN110284610B CN201910688414.0A CN201910688414A CN110284610B CN 110284610 B CN110284610 B CN 110284610B CN 201910688414 A CN201910688414 A CN 201910688414A CN 110284610 B CN110284610 B CN 110284610B
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- reinforced concrete
- concrete structure
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000003068 static effect Effects 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 239000011358 absorbing material Substances 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000035882 stress Effects 0.000 claims 4
- 230000006355 external stress Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a customized dismantled reinforced concrete structure and a static crushing method thereof. The custom-removed reinforced concrete structure has a portion to be subsequently removed and a reserved portion. And a stress isolation belt is arranged between the part to be dismantled and the reserved part, and the stress isolation belt is made of an energy absorbing material between two layers of steel plate clamps. And the embedded single-row or multi-row large-diameter embedded pipes of the part to be removed later serve as static expansion pipes, so that the crushing effect of the reinforced concrete structure removed by the customized part is improved. When the part to be dismantled is used for the service life, an expanding agent is poured into the end part of the plug and then the plug is sealed, so that the structure of the part to be dismantled can be kept for decomposition. The customized demolition building structure provided by the invention can fully utilize the available stable building structure, and the demolition building structure with low noise and low potential safety hazard is more energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of building demolition, and particularly relates to a reinforced concrete structure for customized partial demolition and a static crushing demolition method thereof.
Background
At present, the demand surface of the customized partially dismantled reinforced concrete structure is wider, such as the crushing of reinforced concrete ground continuous walls and the like of in-out holes in a subway shield zone, and most common methods such as manual chiseling or mechanical dismantling are adopted, but the time is long, the noise is large, the risk is large, and the labor cost is high; individual units also try to use static expansion methods, but the research depth is insufficient, the expansion effect and the area outside the boundary of the crushing zone have no effective protection measures, and a complete and effective crushing dismantling method is not formed.
Disclosure of Invention
In order to solve the problem of resource waste caused by the fact that the safety of the rest structure is influenced or the whole structure is required to be dismantled in the dismantling process of the existing reinforced concrete structure needing to be partly dismantled, the invention provides the customized reinforced concrete structure and the static crushing dismantling method thereof, wherein the safety of the whole structure is not influenced in the dismantling process.
The customized partially dismantled reinforced concrete structure refers to the part of the reinforced concrete structure which is predicted to be dismantled after construction but must be constructed. In the dismantling process, the periphery of the boundary of the breaking area of the part structure cannot be damaged, and related measures are needed to be adopted for protection, so that the customized part dismantling contains the meaning of dismantling and also contains the meaning of boundary protection.
At present, the customized partially dismantled reinforced concrete structure is quite common in engineering, such as reinforced concrete underground diaphragm walls of in-out holes of subway shield areas, reserved passage underground diaphragm walls of subway stations and the like, and a large number of similar structures of each subway line need to be dismantled. The demolition of such reinforced concrete structures generally has two characteristics: firstly, selectively crushing partial areas; secondly, in the process of crushing and dismantling, the structure beyond the boundary of the crushing area cannot be damaged.
Through researches, the method for removing and embedding the stress isolation belt by static crushing is provided, so that the reinforced concrete structure is effectively removed by crushing and customizing parts, the safety of the structure which is outside the boundary and needs to be reserved is protected, and the method has good application value and market prospect.
The customized partially dismantled reinforced concrete structure and static crushing and dismantling thereof need to fully consider the problems that the wall thickness strength of the reinforced concrete structure in the crushing area is high, the reinforced concrete is constrained by stress steel bars, the boundary of the crushing area needs to be protected and the like, the purpose is to perform static efficient expansion and crushing on the reinforced concrete in the crushing area, and the safety of the structure outside the boundary of the crushing area cannot be influenced by the stress generated by the expanding agent.
In order to achieve the above object, the customized removed reinforced concrete structure of the present invention has the following structural features:
The custom-removed reinforced concrete structure has a portion to be subsequently removed and a reserved portion.
And a stress isolation belt is arranged between the part to be dismantled and the reserved part, and is composed of two layers of steel sheets and an energy absorbing material clamped between the steel sheets. The stress isolation belt is one of core technologies of the method, extrusion damage to the structure outside the boundary is prevented from being generated by expansion stress diffusion generated by the expansion pipe, and the structure outside the boundary of the crushing area is effectively protected.
The energy absorbing material is plastic or lightweight porous material, and is specifically selected according to the expansion stress.
In order to prevent the structural influence of expansion stress on the periphery of the boundary of the crushing zone, a triangular belt is transformed from the stress direction of 45-degree gradient welded on the surface of the thin steel sheet in contact with the concrete structure of the part to be dismantled later, so that the vertical stress is transformed into a horizontal component.
A single row or a plurality of rows of large-diameter embedded pipes are embedded in the concrete structure of the part to be removed later to serve as static expansion pipes, so that the crushing effect of the reinforced concrete structure removed by the customized part is improved;
According to reinforced concrete structures with different thicknesses, the large-diameter embedded pipes adopt expansion pipes with unequal pipe diameters of 100-120mm, and the distance between the expansion pipes is 200-500mm.
Setting a tee joint and a plug, wherein the tee joint is connected with the plug and the large-diameter embedded pipe, so that the large-diameter embedded pipe is vertical to the plug;
The plug is provided with threads, so that the threads are blocked, and the blocking effect is improved.
The plug adopts a metal thin-wall threaded pipe with the outer diameter of 100-120mm and the wall thickness of 4-6mm.
And pre-cutting the stressed steel bars at the outer side of the concrete structure of the part to be removed in advance, and releasing the constraint on the concrete in the crushing area.
The preparation method of the customized dismantled reinforced concrete structure comprises the following steps:
1. Before pouring concrete, embedding an expansion pipe, a plug and an expansion stress isolation belt in the reinforced concrete structure of which the customized part is removed;
2. And pouring concrete and completing solidification to obtain the customized dismantled reinforced concrete structure.
The static crushing method specifically comprises the following steps:
1. And pre-cutting the outer steel bars in the customized partially dismantled reinforced concrete structure.
2. And adding a static expanding agent into the embedded expansion pipe through the plug, and then plugging the plug.
3. After the static expansion agent is expanded, the reinforced concrete which is removed by the customized part is structurally crushed due to expansion stress, and the crushed reinforced concrete structure is finished to be removed.
The customized demolition building structure provided by the invention has the advantages that the demolition process is low in noise and potential safety hazard, the efficiency is high, and effective protection measures are adopted for reserved building structures which need to be continuously used.
Drawings
Fig. 1 is a schematic structural view of the customized demolition building structure.
Fig. 2 is a schematic structural view of the stress isolation belt.
In the figure, 1 is a concrete integral structure, 2 is a concrete structure of a customized dismantling part, 3 is a stress isolation belt, 4 is an expansion pipe plugging plug, 5 is an expansion pipe, and 6 is a stress direction conversion triangular belt.
Detailed Description
Taking subway shield underground continuous wall as an example:
the underground diaphragm wall for demolishing the entrance and exit part of the subway shield zone is structurally divided into a part to be demolished and a part to be reserved outside the boundary. The concrete implementation method is described by taking a diaphragm wall with the thickness of 800mm and the height of 10000mm as an example.
The purpose of the project is that: the round hole with the diameter of 6700mm is crushed in the middle of the underground continuous wall, meanwhile, in order to ensure the safety of a tunnel portal of a shield, only the underground continuous wall with the thickness of 600mm is dismantled when the underground continuous wall is dismantled, the underground continuous wall with the thickness of 200mm is reserved as a temporary supporting structure, and a cutter disc of the shield is crushed.
Before the concrete of the diaphragm wall is poured, two rows of expansion pipes are arranged in the middle of a reinforcement cage of the diaphragm wall to be removed, the expansion pipes are plastic pipes, the inner diameter of each pipe is 110mm, the interval between every two adjacent expansion pipes is 500mm, and the row interval is 200mm; each expansion pipe is connected with a plug through a tee joint, the plug is a thin-wall steel pipe, the outer diameter of the plug is 110mm, the wall thickness of the plug is 5mm, and the end of the plug is sealed by threads. The end of the plug is flush with the concrete on the outer surface of the underground diaphragm wall.
And a stress isolation belt is arranged at the junction of the part to be dismantled and the reserved part, and consists of two layers of steel sheets and polyurethane plastic pipes clamped between the two layers of steel sheets.
And welding 45-degree chamfer steel bars on the surface of the steel sheet of the stress isolation belt close to one side of the expansion pipe, namely the stress direction conversion triangular belt.
And then pouring concrete to obtain the customized demolished underground continuous wall concrete structure.
Before crushing, firstly cutting the reinforcing steel bars of which the parts to be dismantled are connected with the reserved parts;
Opening a threaded plug, and pouring a static expanding agent from the end part of the plug, wherein the work of pouring the expanding agent is completed within 45 minutes; after 3 hours of expansion time, structural crushing of the concrete structure of the portion to be dismantled occurs.
The to-be-removed part of the diaphragm wall generates expansion force due to the chemical reaction of the expanding agent in the expansion pipe, so that the customized part reinforced concrete structure is expanded and crushed, the time for the shield machine to enter and exit the tunnel portal is shortened, and the safety for the shield machine to enter and exit the tunnel portal is improved.
Claims (7)
1. A customized removed reinforced concrete structure characterized by the following structural features: the customized dismantled reinforced concrete structure is provided with a part to be dismantled and a reserved part;
a stress isolation belt is arranged between the part to be dismantled and the reserved part, and the stress isolation belt is made of an energy absorbing material between two layers of steel plate clamps; the energy absorbing material is plastic or a lightweight porous material;
The part to be removed later is embedded with a single row or a plurality of rows of pipes to serve as static expansion pipes; setting a tee joint and a plug, wherein the tee joint is connected with the plug and the embedded pipe to enable the expansion pipe to be perpendicular to the plug;
The pipe diameter of the static expansion pipe is 100-120mm, and the distance between the expansion pipes is 200-500mm.
2. The custom removed reinforced concrete structure of claim 1, wherein a 45 degree angle of stress direction conversion strip is welded to the steel sheet surface.
3. The custom removed reinforced concrete structure of claim 1, wherein the plug is threaded and is threaded.
4. The custom-made dismantled reinforced concrete structure according to claim 1, wherein the plug is a metal thin-wall threaded pipe with an outer diameter of 100-120mm, a wall thickness of 4mm and a material of 45# steel.
5. The custom-made demolished reinforced concrete structure according to claim 1, wherein the external stress steel bars of the portion of the structure to be subsequently demolished are pre-cut in advance, releasing the constraint on the concrete of the demolished area.
6. A method of making a custom-built dismantled reinforced concrete structure according to any one of claims 1 to 5, wherein,
(1) Before pouring concrete, embedding an expansion pipe, a plug and an expansion stress isolation belt in the reinforced concrete structure of which the customized part is removed;
(2) And pouring concrete and completing solidification to obtain the customized dismantled reinforced concrete structure.
7. Static crushing method of a customized removed reinforced concrete structure according to any one of claims 1-5, characterized in that it comprises in particular the following steps:
(1) Pre-cutting the outer side steel bars in the customized part dismantled reinforced concrete structure;
(2) Adding a static expanding agent into the embedded expansion pipe through the plug, and sealing the plug;
(3) And finishing the expanded reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688414.0A CN110284610B (en) | 2019-07-29 | 2019-07-29 | Customized partially dismantled reinforced concrete structure and static crushing dismantling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688414.0A CN110284610B (en) | 2019-07-29 | 2019-07-29 | Customized partially dismantled reinforced concrete structure and static crushing dismantling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110284610A CN110284610A (en) | 2019-09-27 |
| CN110284610B true CN110284610B (en) | 2024-04-19 |
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| CN201910688414.0A Active CN110284610B (en) | 2019-07-29 | 2019-07-29 | Customized partially dismantled reinforced concrete structure and static crushing dismantling method thereof |
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| CN (1) | CN110284610B (en) |
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| CN110644809B (en) * | 2019-09-29 | 2021-09-24 | 张永利 | Construction method for breaking and dismantling concrete body by using embedded part in concrete and embedded expansion pipe hydraulic pressure bursting method |
| CN112502729A (en) * | 2020-12-07 | 2021-03-16 | 上海市机械施工集团有限公司 | Method for breaking hole door to enter and exit hole |
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|---|---|---|---|---|
| CN102127975A (en) * | 2011-04-14 | 2011-07-20 | 葛培中 | Concrete beforehand pore-forming static breaking technology |
| JP2016121458A (en) * | 2014-12-24 | 2016-07-07 | カヤク・ジャパン株式会社 | Removal method of composite beam concrete |
| CN109295987A (en) * | 2018-10-12 | 2019-02-01 | 华汇工程设计集团股份有限公司 | A kind of internal support of foundation pit beam that can quickly remove |
| CN109680986A (en) * | 2019-01-10 | 2019-04-26 | 哈尔滨理工大学 | Reinforced concrete structure static state noiseless method for dismounting |
| CN210562704U (en) * | 2019-07-29 | 2020-05-19 | 南京君缘科爆工程技术有限公司 | Customized demolishd reinforced concrete structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919005B2 (en) * | 2002-05-09 | 2005-07-19 | The United States Of America As Represented By The Secretary Of The Army | Configuration and electro-osmotic pulse (EOP) treatment for degrading porous material |
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2019
- 2019-07-29 CN CN201910688414.0A patent/CN110284610B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127975A (en) * | 2011-04-14 | 2011-07-20 | 葛培中 | Concrete beforehand pore-forming static breaking technology |
| JP2016121458A (en) * | 2014-12-24 | 2016-07-07 | カヤク・ジャパン株式会社 | Removal method of composite beam concrete |
| CN109295987A (en) * | 2018-10-12 | 2019-02-01 | 华汇工程设计集团股份有限公司 | A kind of internal support of foundation pit beam that can quickly remove |
| CN109680986A (en) * | 2019-01-10 | 2019-04-26 | 哈尔滨理工大学 | Reinforced concrete structure static state noiseless method for dismounting |
| CN210562704U (en) * | 2019-07-29 | 2020-05-19 | 南京君缘科爆工程技术有限公司 | Customized demolishd reinforced concrete structure |
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| CN110284610A (en) | 2019-09-27 |
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